Directional Valves

DC08-40 — Pilot-Operated Check Valve
  Selection guide - similar valves.
  PDF file of this page
  STP file for DC08-40.
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DC08-40 Valve

SYMBOL:
DC08-40 Valve symbol

DESCRIPTION
A screw-in, cartridge-style, dual, pilot-operated, hydraulic check valve
for blocking or load-holding.

OPERATION
The DC08-40 will block flow from 1 to 2, and from 4 to 3. Flow is allowed in
the opposite direction when pressure is applied to port 2 and/or port 3.
The valve has a 3:1 pilot ratio, so at least 1/3 of the load pressure at port 1 or 4
is required at the pilot lines (ports 2 or 3) to open the flow passage to allow flow from ports 1 or 4.
The check is spring-biased at 1.7 bar (25 psi) to assure holding in a static or no-load condition.
An optional spring biased at 9.3 bar (135 psi) is available.

FEATURES
• Hardened seat for long life and low leakage.
• Low pressure drop.
• Compact size.

RATINGS
Operating Pressure: Inlet: 240 bar (3500 psi)
Inlet Flow: up to 19 lpm (5 gpm)
Maximum Internal Leakage at 207 bar (3000 psi): 0.25 ml/minute (5 drops/minute)
Pilot Ratio: 3:1
Check Spring Bias: 1.72 bar (25 psi) standard; with sealed piston option: 6.2 bar (90 psi) minimum
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54 to 107°C (-65 to 225°F) with polyurethane and urethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC08-4; See page 9.108.1_4w
Cavity Tool: CT08-4xx; See page 8.600.1
Seal Kit: SK08-4x-MMM; See page 8.650.1

PERFORMANCE:

DC08-40 Valve Performance Chart

  DIMENSIONS:
DC08-40 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.13 kg. (0.28 lbs.);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces;
Buna N O-rings and polyester elastomer back-ups standard.

Standard Ported Body: Weight:
0.18 kg. (0.40 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies available; dimensions may differ.
See page 8.008.1_4w.
  ORDERING CHART:

DC08-40 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for DC08-40 Request a quote.